code: def log_succeed(self, req_time, n=1):
      self.success += n
      self.succ_ps.put(time.time(), 1)
      self.succ_times.append(req_time)
      self.succ_time_ps.put(time.time(), req_time)
  
imports: import asyncio
  import math
  import time
  from collections import defaultdict
  from tabulate import tabulate
label_desc: Use image node_id 4 for calling the Stat obj's underlying member method code with example usage: obj.log_succeed(req_time, n) without return types